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首页> 外文期刊>American Orthoptic Journal >Why Do Children with Down Syndrome Have Subnormal Vision?
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Why Do Children with Down Syndrome Have Subnormal Vision?

机译：为什么唐氏综合症患儿的视力不正常？

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Purpose: Explore characteristics of Down syndrome to find causes of subnormal vision. Explore vision studies to find patterns of decreased vision.Results: Some obvious potential causes are nystagmus and high refractive error; however, nystagmus and high refractive errors are not a guarantee of poor vision. Accommodative insufficiency is often present, compromising near vision. Vision studies are difficult to compare mainly because of differences in determining and correcting refractive errors. Sweep visually evoked potentials (sVEP) require little effort from the patient and have shown near normal vision in infancy, with improvement leveling off at age 12 to 24 months without further improvement.Conclusions: People with Down syndrome have a wide variation in visual acuity, but generally 20/40 or worse. Both the eye and brain tend to be different in these patients compared to age matched normal subjects. Also, accommodative insufficiency (determined by dynamic retinoscopy) is often present in children Down syndrome, making bifocals a necessary consideration.
机译：目的：探讨唐氏综合症的特征，以发现视力不正常的原因。结果：一些明显的潜在原因是眼球震颤和高屈光不正。但是，眼球震颤和高度屈光不正不能保证视力不佳。经常出现适应性供血不足，损害近视力。视力研究很难比较，主要是因为在确定和校正屈光不正方面存在差异。清扫视觉诱发电位（sVEP）不需要患者付出任何努力，婴儿期的视力也已接近正常，在12至24个月大时趋于平稳，而无进一步改善。结论：唐氏综合症患者的视力差异很大，但通常为20/40或更差。与年龄相匹配的正常受试者相比，这些患者的眼睛和大脑都倾向于不同。此外，儿童唐氏综合症中常存在适应性供血不足（由动态检影法确定），因此需要将双焦点患者纳入考虑范围。

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